[MlMt] RSVP/respond to ical/.ics calendar invite?

[Sam Hathaway]

Jonas,

Thanks for your question. I had been meaning to research this for a 
while and hadn’t gotten around to it until now.

Like most things related to iCalendar and CalDAV, it’s super hard to 
find information on event replies. The short story is that replies are 
done by sending an iCalendar file back to the organizer with 
METHOD:REPLY and certain fields filled out.

The format of reply iCalendar files is defined by the iCalendar 
Transport-Independent Interoperability Protocol (iTIP), [RFC 
5546](https://tools.ietf.org/html/rfc5546). See section 
[3.2.3](https://tools.ietf.org/html/rfc5546#section-3.2.3) for details 
and [4.2](https://tools.ietf.org/html/rfc5546#section-4.2) for an 
example.

The iCalendar reply can be sent as an email attachment or via Scheduling 
Extensions to CalDAV, [RFC 6638](https://tools.ietf.org/html/rfc6638). I 
haven’t grok’d that standard, but see [Appendix 
B](https://tools.ietf.org/html/rfc6638#appendix-B) for an example that 
mostly makes sense.

Hope this helps!
-sam

On 13 Oct 2017, at 19:26, Jonas Kemper wrote:

> Hi everybody!
>
> I'm trying to wrap my head around how RSVPing to calendar invites 
> works. I appreciate how easy this is for example in gmail/outlook.
>
> Now, my situation might be a little bit specific. I have no offline 
> calendar configured whatsoever. This means, that I don't care that the 
> calendar event sent is important in a calendar. I just want to RSVP to 
> the invite. As far as I have understood the standard at this point, 
> this should basically just be another email reply with another .ics 
> file attached. I might be wrong about this though.
>
> Has anybody dealt with this before? My ideal scenario would be control 
> elements to respond with "yes/no/maybe" in Mailmate whenever a meeting 
> invite comes in.
>
> Best,
> Jonas
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